Improvement in sewer-traps



UNITED STATES ATENT Tirion OHBISTOPHERLEWIS, OF COLUMBUS, OHIO.

IMPROVEMENT IN SEWER-TRAPS.

Specification forming part of Letters Patent No. 166,116, dated July 27, 1875 application tiled June 17, 1875.

To all whom it may concern:

Be it known that l, CHRISTOPHER LEWIS, of Columbus7 in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Sewer-Traps; and I do hereby declare that the following is a full, clear, and exact description thereof', which will enable others skilled in the art to which it pery tains to make and use the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon, which form a part oi' this specification.

My invention relates to improvements in traps for sewers, drains, and other similar places, whereby the doors or aps ofthe same may be automatically opened by the liquid or liquid and substances requiring to pass through the trap, and, when such liquid Orliquid and substances has so passed, the said aps or doors may be automatically closed.

According to my invention, I form a framing, by preference oi' iron, adapted to be set in the brick-work or masonry of the well or passage leading to the sewer, in the center of which I form an aperture, by preference corresponding to the internal diameter of the well or passage. Around the aperture in the framing a iiange or rim is formed, against which the flaps or doors sit when closed. The doors are mounted and supported on hinges pivoted to theframing, and are so formed as to clear the iiange. On the under side ofthe flaps or doors bent arms are formed, extending right and left from the center of lthe trap, (one to each door,) on the extremity of each of which is at'- fixed a weight or ball, which moves by its gravity and the leverage of its'bent arm to close its door after the passage of any liquid or liquid and substances through the opening in the trap.

But, that my invention may be fully understood, I will describe the same in detail, by reference to the drawings.

Figure l represents a side view of a trap constructed according to my invention, showing the aps or doors closed. Fig. 2 represents a perspective view ofthe same with the doors partly open 5 and Fig. 3 is a side view, showing the doors or aps wide open; and Figs. 4 and 5 are sectional views of the trap with the doorsV closed.

ln each of the views similar letters of reference are employed to indicate corresponding parts wherever they occur;

A represents the framing, which is shown constructed of iron, and in the form of a circular plate; other forms, however, may be adopted. This framing A is adapted to beinserted between the courses, and held in positionv by the brick-work or masonry of the walled passage leading to the sewer. [n the center of the framing A an aperture, A1, is formed, around which, on the under side of the framing A, is a flange or rim, A2, against which the flaps or doors B B sit when closed, as shown by Fig. l. The doors B B are mounted and supported on hinges Bl B1, pivoted to the framing A, and so curved or formed as to clear the flange or rim A2, and allow of the doors B B sitting true and against such iiange or rim A2. To the under side of each ofthe doors B B one end of a bent arm, B2, is

afiixed, extending outward from the center of the trap. On the extremity B3 of each ofthe arms BZ a weight or ball, B4, is affixed, which moves, by its gravity and the leverage of its bent arm B2, to its door B, closed and rmly set against the flange or rim A2, except when the doors are pressed open by the weight of liquid or liquid and substances passing through the aperture A1, overcoming the weight and leverage of the arms B2 and balls B4, The arms B2 are, by preference, so bent or formed that their extremities B3 and balls or weights B4 shall bein a line parallel with the plane of the doors B. B5 are notched recesses .formed in the edge of the framing A, to allow of the arms B2 being pressed fully back, as shown by reference to Fig. 2. The weight of the doors B and of the balls B4 are so adjusted, in relation to each other, as to allow of the'free passage of liquid or liquid and substances through the aperture A1.-

The face of the doors or ilaps B may b made concave, if desired, as shown in Fig. 5, to allow ofthe liquid or substances placed upon the same to pass oli' easily, and thus prevent them from being obstructed.

The operation of the apparatus is as follows: Any liquid or liquid and substances requiring to enter or pass through the trap will, by its weight and pressure on thehfront surface of the door B, overcome the weight and leverage of' the balls B4 and levers B2, and cause the doors B to open; but so soon as such liquid or liquid and substances have passed the aperture A1, the doors B, by reason of the pressure on their outer surfaces being removed, will be instantaneously closed by the weight of leverage of the balls B4 and arms B2, thus keeping said trap always closed when the substances have passed through, thus avoiding the escape of bad odors. v

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

CHRISTOPHER LEWIS.

Witnesses:

JOHN H. GROVE, C. SMITH 

